Hi-rich dwarf galaxies in the Hydra I cluster II. Spectroscopic data

被引：15

作者：

Duc, PA ^{[1
]}

Cayatte, V

Balkowski, C

Thuan, TX

Papaderos, P

van Driel, W

机构：

[1] CNRS URA 2052, F-91191 Gif Sur Yvette, France

[2] CEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France

[3] CNRS, Observ Paris, DAEC, UMR 8631, F-92195 Meudon, France

[4] Univ Paris 07, F-92195 Meudon, France

[5] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA

[6] Univ Sternwarte, D-37083 Gottingen, Germany

[7] Observ Paris, Unite Sci Nancay, CNRS USR B704, F-92195 Meudon, France

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 369卷 / 03期

关键词：

galaxies : abundances; galaxies : dwarf; galaxies : clusters : general;

D O I：

10.1051/0004-6361:20010188

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present spectrophotometric data for a sample of 15 H I-selected dwarf galaxies in the Hydra I cluster (see Duc et ai. 1999, Paper I). Long-slit spectra were obtained along an axis including the nucleus and the brightest H II region in each galaxy. The oxygen abundance was estimated from the emission lines using various methods. AII dwarfs host one or several star-forming regions that are, for the most Dart, located outside the nucleus. We did not find in this survey any extremely metal-deficient objects, but we did observe some galaxies with a surprisingly high metallicity for their luminosity. In a following paper in this series, we will discuss the global properties of the H I-rich dwarfs in the Hydra I cluster and focus on their dependence on the environment.

引用

页码：763 / 777

页数：15